CVE-2015-2977 in yoyaku_v41
Summary
by MITRE
Webservice-DIC yoyaku_v41 allows remote attackers to create arbitrary files, and consequently execute arbitrary code, via unspecified vectors.
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Analysis
by VulDB Data Team • 07/27/2017
The vulnerability identified as CVE-2015-2977 affects the Webservice-DIC yoyaku_v41 application, presenting a critical security flaw that enables remote attackers to achieve arbitrary file creation and code execution capabilities. This vulnerability resides within a web service implementation that processes user input without proper validation mechanisms, creating an attack surface that can be exploited by malicious actors from remote locations. The unspecified vectors suggest that the flaw may manifest through multiple attack pathways, potentially including parameter manipulation, file upload handling, or direct input injection techniques that bypass expected security controls.
The technical nature of this vulnerability aligns with common software security weaknesses documented in the Common Weakness Enumeration catalog under CWE-73, which describes "External Control of File Name or Path" as a critical weakness allowing attackers to manipulate file system operations. This weakness directly enables the arbitrary file creation capability that forms the foundation for subsequent code execution. The vulnerability represents a privilege escalation issue where unauthenticated or authenticated attackers can leverage the service to place malicious files in critical system directories, potentially leading to full system compromise. The attack vector typically involves sending specially crafted requests to the web service endpoint that processes user data, where the application fails to validate or sanitize input parameters that influence file system operations.
The operational impact of CVE-2015-2977 extends beyond simple code execution to encompass complete system compromise and potential data breaches. Attackers exploiting this vulnerability can upload malicious files that persist on the target system, allowing for long-term access and further attack escalation. The remote nature of the exploit means that attackers do not require physical access to the system and can operate from any location with network connectivity. This vulnerability particularly affects organizations relying on web service implementations for booking or reservation systems, where the service may handle sensitive user data and system resources. The potential for privilege escalation and persistent access makes this vulnerability especially dangerous in enterprise environments where such services might have elevated system privileges.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security hardening measures. Organizations should implement comprehensive input validation and sanitization across all user-facing interfaces, particularly those handling file operations or path manipulation. The principle of least privilege should be enforced by restricting file system permissions for web service accounts and ensuring that applications operate with minimal required privileges. Regular security updates and patch management processes should be implemented to address similar vulnerabilities in third-party components. Network segmentation and monitoring solutions should be deployed to detect anomalous file creation activities and unauthorized access attempts. The vulnerability also highlights the importance of secure coding practices and application security testing, particularly for web services that process external input. Organizations should consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts targeting similar weaknesses. Additionally, regular security assessments and penetration testing should be conducted to identify and remediate similar vulnerabilities before they can be exploited by threat actors.